<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
<div id="vueInside">
    <div :key='index' v-for='(item,index) in arr'>{{item}}</div>
</div>
</body>
<script src="./js/vue.js"></script>
<script>
    var vueShili = new Vue({
        el: '#vueInside',
        data() {
            return {
                // arr: [{name:'apple'}, {name:'orange'}],
                arr: ['apple', 'orange','banana',],
                info: {
                    name: 'mike', gender: 'male',
                },
            }
        },
    })
    Vue.set(vueShili.arr,1,'lemon')
</script>

</html>